Improvement in endless-chain pumps



W. McGREW.

ENDLESS CHAIN-PUMP. No.17Z,14Z. Patented Jamil, 1876.

WITNESSES v I INVENTOR ATTORNEYS Nv PE'ILERS, PHOTO-LITHOGRAPNER,WASHINGTON. D C,

- UNITED STATES PATENT OFFICE. 4

WESLEY MOGREW, OF XENIA, ILLINOIS.

lMPROVEMENT IN ENDLESS-CHAIN PUMPS.

Specification forming part of Letters Patent No. 172,142, dated January11, 1876; application filed December 4, 1875.

provement in Endless-Chain Pumps; and I do hereby declare that thefollowingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawingsmaking a part of this specification, and to the letters and figures ofreference marked thereon.

The figure of the drawing is a representation of a section of mypump-valve.

This invention has relation-to lifting-buckets for endless-chain pumpsand the nature of my invention consists in a bucket composed ofgutta-percha, or other elastic substance, and a solid expanding disk,wherebythe pressure of Water being lifted will operate on said disk toexpand the elastic portion of the bucket and keep its periphery closelypressed against the wall of the pump-tube, as will be hereinafterexplained..

In the annexed drawing, A designatesthe circular body of the improvedbucket, which is made of guttapereha or any other suitable elasticmaterial. The periphery of this pol",-

tion A is beveled at a, and the upper side has a circular recess in it,which is bounded by upwardly-flaringwalls b. B designates a circularpiece of wood or metal, which has a beveled periphery, and is applied inthe recess of the portion A. G designates the stem of two eyes, 0 c,which stem passes centrally through the body portion A and circularpi'eceB, and forms the connecting-link ofthe bucket.

It will be seen from the above description that the weight of a columnof Water in the pump-tube, acting on the piece B, will cause it to wedgeitself into its recess and expand the elastic portion A, and cause it towork closely in the bore of said tube.

I am aware that a chain-pump bucket having a conical elastic shelltitted to a solid conical bore has heretofore been employed, and

I' therefore lay no claim to such invention.

What I claim as new, and desire to secure by Letters Patent, is

The elastic circular perforated bucket A, beveled at a, and provided inits upper face with a recess, bounded by upwardly and out wardiy flaringwalls I), in combination with the circular perforated non-elastic diskB, having its periphery upwardly and outwardly beveled, and stem 0,providedwith eyes 0 c, substantially as described, and for the purposeset forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

W. MGGREW.

Witnesses:

THEOPHILUS SMITH SAML. E. PAINE.

